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KX-B620 Series
KX-B520 Series
1) Circuit Operation
This circuit is made up of a reflective type optsensor and the buffer circuit.
There are 2 black marks at the bottom of the screen which absorbs light effectively.
When the sensor detects a black mark, the output signal "SHEND"
becomes "L", and input into the
CPU from D7 Port.
SENSOR BOARD
CONTROL BOARD
Fp
A
rs ee ae
SS
a |
1C400
ON2173R
Fig. 41 Circuit Diagram
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